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Latest M4 Traffic News, Updates & Roadworks

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M4 Traffic

Latest M4 Traffic News Now

0Accidentsnone reported on the M4 that we are aware of1Roadworks activelive on the M4 right now — see details8Plannedscheduled on the M4 — see details

Live M4 traffic data from National Highways · updated 08:17 Mon 5 Oct 2026

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Welcome to the M4 traffic search news page.

Helping you find the latest M4 traffic news and updates.

We hope that the traffic news will help you avoid traffic jams and roadworks.

Our traffic news is designed to provide you with traffic news in a clear and informative way.

You can use the filter options below to find the latest traffic news for the M4 journey you are planning to take.

15 matching items - showing 1-10 of 15 total available news items

  • Hardshoulder closure

    Active nowRoadworksEastbound
    Time now: Monday, 5 October 2026, 08:17

    08:155 Oct 2026reported just now

    Location
    M4 eastbound between J17 and J16
    Direction
    Eastbound
    Lanes closed
    Hard shoulder closed
    Reason
    Roadworks
    Schedule
    23:59 Tue 27 Apr 2021 → 18:00 Fri 30 July 2027
    ⏳Long-term works - HA planned end: 18:00 Fri 30 July 2027.

  • M4 eastbound within J20

    On the signals now50 mph limitEastboundAt J20
    Time now: Monday, 5 October 2026, 08:17

    08:115 Oct 2026set 5 min ago✓ Checked by us 08:17

    WhereM4 eastbound, At J20 · on 1 signal
    SinceSet 08:11 Mon 5 Oct 2026
    We check these speed signals at least every five minutes. A number in a red ring is a mandatory speed limit; a number on its own is advisory. Always follow the signals you can see on the road.

  • M4 eastbound within J20

    On the signals now40 mph limitEastboundAt J20
    Time now: Monday, 5 October 2026, 08:17

    08:115 Oct 2026set 5 min ago✓ Checked by us 08:17

    WhereM4 eastbound, At J20 · on 1 signal
    SinceSet 08:11 Mon 5 Oct 2026
    We check these speed signals at least every five minutes. A number in a red ring is a mandatory speed limit; a number on its own is advisory. Always follow the signals you can see on the road.

  • M4 eastbound between J20 and J19

    On the signals now40 mph limitEastboundBetween J20 & J19
    Time now: Monday, 5 October 2026, 08:17

    08:115 Oct 2026set 5 min ago✓ Checked by us 08:17

    WhereM4 eastbound, Between J20 & J19 · on 4 signals
    SinceSet 08:11 Mon 5 Oct 2026
    We check these speed signals at least every five minutes. A number in a red ring is a mandatory speed limit; a number on its own is advisory. Always follow the signals you can see on the road.

  • M4 westbound between J19 and J20

    On the signals now60 mph limitWestboundBetween J19 & J20
    Time now: Monday, 5 October 2026, 08:17

    08:095 Oct 2026set 7 min ago✓ Checked by us 08:17

    WhereM4 westbound, Between J19 & J20 · on 2 signals
    SinceSet 08:09 Mon 5 Oct 2026
    We check these speed signals at least every five minutes. A number in a red ring is a mandatory speed limit; a number on its own is advisory. Always follow the signals you can see on the road.

  • link road from M4 westbound J20 to M5 J15

    On the signals now60 mph limitWestboundLink road at J20
    Time now: Monday, 5 October 2026, 08:17

    08:095 Oct 2026set 7 min ago✓ Checked by us 08:17

    WhereM4 westbound, Link road at J20 · on 1 signal
    SinceSet 08:09 Mon 5 Oct 2026
    We check these speed signals at least every five minutes. A number in a red ring is a mandatory speed limit; a number on its own is advisory. Always follow the signals you can see on the road.

  • M4 eastbound between J20 and J19

    On the signals now50 mph limitEastboundBetween J20 & J19
    Time now: Monday, 5 October 2026, 08:17

    08:075 Oct 2026set 9 min ago✓ Checked by us 08:17

    WhereM4 eastbound, Between J20 & J19 · on 2 signals
    SinceSet 08:07 Mon 5 Oct 2026
    We check these speed signals at least every five minutes. A number in a red ring is a mandatory speed limit; a number on its own is advisory. Always follow the signals you can see on the road.

  • M4 eastbound lane 1 and 2 closure (47/0 to 44/8)

    PlannedRoadworksEastbound
    Time now: Monday, 5 October 2026, 08:17

    08:155 Oct 2026reported just now

    Location
    M4 eastbound within J8
    Direction
    Eastbound
    Lanes closed
    Lane closures
    Reason
    Maintenance work
    Schedule
    20:00 Mon 5 Oct 2026 → 06:00 Tue 6 Oct 2026

    Forecast - not confirmed

    🚧HA scheduled: 20:00 Mon 5 Oct 2026 → 06:00 Tue 6 Oct 2026 starts in about 12 hours · lasts ~10h 00m

  • M4 both directions Jct 15 to 22 - mobile lane closure

    PlannedRoadworksBoth directions
    Time now: Monday, 5 October 2026, 08:17

    08:155 Oct 2026reported just now

    Location
    M4 eastbound between J18 and J17
    Direction
    Both directions
    Lanes closed
    Lane closures
    Reason
    Maintenance work
    Schedule
    20:00 Mon 5 Oct 2026 → 06:00 Tue 6 Oct 2026

    Forecast - not confirmed

    🚧HA scheduled: 20:00 Mon 5 Oct 2026 → 06:00 Tue 6 Oct 2026 starts in about 12 hours · lasts ~10h 00m

  • M4 eastbound Jct 23 to Jct 22 Prince of Wales Bridge lane closure 203/2-195/1

    PlannedRoadworksEastbound
    Time now: Monday, 5 October 2026, 08:17

    08:155 Oct 2026reported just now

    Location
    M4 eastbound between J23 and J22
    Direction
    Eastbound
    Lanes closed
    Lane closures
    Reason
    Maintenance work
    Schedule
    21:00 Mon 5 Oct 2026 → 06:00 Tue 6 Oct 2026

    Forecast - not confirmed

    🚧HA scheduled: 21:00 Mon 5 Oct 2026 → 06:00 Tue 6 Oct 2026 starts in about 13 hours · lasts ~9h 00m

    • Updated 08:17 Mon 5 Oct 2026

    Powered by National Highways’ Transport Data Feeds.

    How to find the latest M4 traffic news

    Our live M4 feed updates throughout the day with the latest reports on delays, roadworks, accidents, closures and congestion along the M4 motorway. Search by junction number and direction — eastbound or westbound — to focus on the stretch you’re travelling, whether that’s the M25 interchange at Junction 4b, the Severn crossing, the M5 at Almondsbury, or the run into Cardiff and Swansea. A quick check before you leave can save you sitting in avoidable traffic.

    Why M4 traffic news changes along the motorway

    The Department for Transport counts M4 traffic hour by hour and end to end. What it shows is that the latest M4 news means something different depending on where you are joining the motorway today.

    156,491

    M4 vehicles a day

    at the busiest point, junction 4 by Heathrow — the London commuter end of the M4, where 81% of the traffic is cars.

    128,594

    a day at Bristol

    on the M4 at the M4/M5 interchange — fewer vehicles, but 11,167 lorries and 24,926 vans. The same motorway, carrying a very different kind of traffic.

    32%

    the M4 rush-hour swing

    between the busiest M4 hour (7am) and the quietest (11am) at junction 4. The M4 has a genuine peak, so timing your journey actually helps here.

    81

    M4 count points

    measure this motorway from London to South Wales. It is one of the most closely watched roads in the country, and every M4 accident, delay and roadworks report we publish comes from that network.

    So an M4 delay at junction 4 and an M4 delay at junction 19 are not the same problem. That is why this page carries all the latest M4 traffic news together — accidents, crashes, roadworks and lane closures — so you can find the ones on your stretch of the M4 motorway today rather than reading about somebody else’s.

    Hourly figures are from the Department for Transport’s own M4 count point beside junction 4, counted on 3 September 2025, published 20 May 2026. Daily figures are Average Annual Daily Flow for 2025.

    M4traffic.co.uk is dedicated to the latest M4 traffic news, checked every five minutes, 24 hours a day. The M4 meets the M25 at Junction 4b near Heathrow and the M5 near Bristol — see M25 Traffic and M5 Traffic.